MathDB
equal x values of sine and cosine

Source:

October 15, 2005
trigonometry

Problem Statement

If sin⁡2xsin⁡3x=cos⁡2xcos⁡3x\sin 2x \sin 3x = \cos 2x \cos 3x, then one value for xx is A. 18∘18^\circ B. 30∘30^\circ C. 36∘36^\circ D. 45∘45^\circ E. 60∘60^\circ
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